A Database of Drosophila Genes & Genomes

FB2008_07, released August 8, 2008
 

Allele Dmel\Fmr1Scer\UAS.cZa

General Information
SymbolDmel\Fmr1Scer\UAS.cZaSpeciesD. melanogaster
NameSaccharomyces cerevisiae UAS construct a of ZhangFlyBase IDFBal0131027
Feature typealleleCreated / Updated2006-08-20/2006-08-20
Associated geneDmel\Fmr1
Allele class
Mutagenin vitro construct | regulatory fusion
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Allele class
Mutagen
Mapped Features and Mutations
Type
Symbol & Location
Additional Notes
References
 
 
 
 
Associated Sequence Data
DDBJ /
EMBL /
GenBank
DNA sequence
Protein sequence
Name
 
UniProtKB/Swiss-Prot
    UniProtKB/TrEMBL
      Progenitor genotype
      Nature of the lesion
      Statement
      Reference
      Construct: Expression of Fmr1 is governed by Scer\UAS regulatory sequences.
      Assay mode
      Carried in construct
      Cytology
      hide Phenotypic Data
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      hide Phenotype Manifest In
      mushroom body & neuron | somatic clone, with Scer\GAL4OK107
      mushroom body & neuron & dendrite | somatic clone, with Scer\GAL4OK107
      gamma-lobe & neuron | somatic clone, with Scer\GAL4OK107
      photoreceptor cell & synapse & lamina receptor cell, with Scer\GAL4hs.2sev
      hide Detailed Description
      Statement
      Reference
      When expression is driven by Scer\GAL4elav-C155 flies show abnormally outspread wings and cannot fly. Flies are uncoordinated and show adult lethality - dying 5-10 days post-eclosion. When expression is driven by Scer\GAL4Mhc.PW flies' wings are droopy or held up and they cannot fly. When expression is driven by Scer\GAL4G7 flies show pupal lethality. When expression is driven by Scer\GAL4hs.2sev the retina is disordered with misshapen rhabdomeres, abnormal rhabdomere numbers and fused ommatidia. Phototransduction is normal, however synaptic transmission is reduced (as indicated by a reduction in off-transient mean amplitude as assayed by ERG). When expression is driven by Scer\GAL4elav-C155 the larval neuromuscular junction shows pronounced synaptic undergrowth and underelaboration of synaptic terminals. Muscle 4 has 36% decrease in number of boutons over controls. Bouton diameter is nearly twice that of wild type. When expression is driven by Scer\GAL4Mhc.PW the larval neuromuscular junction shows pronounced synaptic undergrowth and underelaboration of synaptic terminals. Muscle 4 has 17% decrease in number of boutons over controls. Mean EJC amplitude is unaffected when expression is driven by Scer\GAL4elav-C155 but mEJC analysis shows that the frequency of spontaneous glutamate release is increased five-fold (though unaffected when driven by Scer\GAL4Mhc.PW).
      When expression is driven by Scer\GAL4ato.3.6 axon extension from the lobula to the medulla fails completely. Fibers enter the lobula but then either project to inappropriate sites within the lobula or stop at the lobula-medulla border.
      Expression of Fmr1Scer\UAS.cZa under the control of Scer\GAL4OK107 results in dramatic defects in the mushroom body axon lobes; the β lobe always overextends across the midline, the β' lobe often shows apparently random directions of axon projection which are often outside of the mushroom body domain and the γ lobe always shows a dramatic decrease in volume and is sometimes completely lost. The number of cell body processes produced by neuronal cells in the mushroom body is reduced 2-fold in single cell clones expressing Fmr1Scer\UAS.cZa under the control of Scer\GAL4OK107 compared to control single cell clones. The "claw-like" structure normally seen at the terminal of dendritic branches (this consists of a fine dendritic terminal arbor) is severely reduced or completely absent in the mutant cells. Single γ neurons in the mushroom body that express Fmr1Scer\UAS.cZa under the control of Scer\GAL4OK107 in an otherwise wild-type background show underbranching and dramatically reduced growth. Most of these mutant γ neurons maintain their process along the ventral edge of the horizontal lobe and aberrantly invade the β lobe.
      Flies that express Fmr1Scer\UAS.cZa, under the control of Scer\GAL4P2.4.Pdf, almost completely lack wild-type target innervation by the LNv. In the brains of flies that overexpress Fmr1Scer\UAS.cZa under the control of Scer\GAL4c747, there is a significant increase in the gap between the β lobes and between the γ lobes of the mushroom body.
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      Statement
      Reference
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      Statement
      Reference
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      hideSuppressed by
      Statement
      Reference
      hideSuppressor of
      Statement
      Reference
      Fmr1Scer\UAS.cZa, Scer\GAL4P2.4.Pdf is a suppressor of ventral adult lateral neuron & commissure phenotype of Scer\GAL4P2.4.Pdf, chicScer\UAS.cCa
      hide Additional Comments
      hide Genetic Interactions
      Statement
      Reference
      Flies that co-express chicScer\UAS.cCa and Fmr1Scer\UAS.cZa, both under the control of Scer\GAL4P2.4.Pdf, show a wild-type-like pattern of LNv innervation. The LNv fasciculation phenotype seen when chicScer\UAS.cCa is expressed alone is suppressed. Coexpression of chicScer\UAS.cCa significantly reduces the mushroom body phenotype seen when flies overexpress Fmr1Scer\UAS.cZa under the control of Scer\GAL4c747.
      hide Xenogenetic Interactions
      Statement
      Reference
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      Comments
      hide Stocks ( 1 )
      Bloomington
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      Discoverer
      hide Synonyms & Secondary IDs ( 3 )
      Reported As
      Symbol Synonym
      Fmr1Scer\UAS.cZa
       
      Name Synonym
      Saccharomyces cerevisiae UAS construct a of Zhang
      Secondary FlyBase IDs
        hide References ( 4 )
        Research paper
        Reeve et al., 2005, Curr. Biol. 15(12): 1156--1163
        The Drosophila fragile X mental retardation protein controls actin dynamics by directly regulating profilin in the brain. [FBrf0187329]
        Pan et al., 2004, Curr. Biol. 14(20): 1863--1870
        The Drosophila fragile X gene negatively regulates neuronal elaboration and synaptic differentiation. [FBrf0180069]
        Morales et al., 2002, Neuron 34(6): 961--972
        Drosophila Fragile X protein, DFXR, regulates neuronal morphology and function in the brain. [FBrf0149142]
        Zhang et al., 2001, Cell 107(5): 591--603
        Drosophila fragile X-related gene regulates the MAP1B homolog Futsch to control synaptic structure and function. [FBrf0141416]